What is the name of the functional group that is necessary for dehydration reaction to occur

 Dehydration synthesis involves the formation of new chemical bonds between two molecules which leads to the formation of new compounds. A reaction occurs with the loss of water molecule at each step. The loss of water molecule can occur due to reaction between two functional groups like –OH, -NH2 or –COOH.

Explanation:

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

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